Augusta, Ga. - Rory McIlroy maintained his lead at the Masters on Friday but playing companion Jason Day did everything he could to challenge the 21-year-old from Northern Ireland.

The Associated PressRory McIlroy is still leading after the second round of the Masters.

McIlroy shot a 3-under-par 69 and is at 10-under 134 after two trips around Augusta National Golf Course, but Jason Day posted a sizzling 8-under 64 to move to 8 under. They likely will be the final twosome Saturday afternoon.

Veteran K.J. Choi shot a 2-under 70 and is in third at 7-under 137. Geoff Ogilvy, a former U.S. Open champion, and Alvaro Quiros, co-leader after Thursday's first round, are tied for fourth at 6-under 138. Ogilvy shot 69 Friday while Quiros posted a 73.